Package g2001_2100.s2011_final_value_of_variable_after_performing_operations

Class Solution

java.lang.Object
g2001_2100.s2011_final_value_of_variable_after_performing_operations.Solution
public class Solution extends Object
2011 - Final Value of Variable After Performing Operations\. Easy There is a programming language with only **four** operations and **one** variable `X`: * `++X` and `X++` **increments** the value of the variable `X` by `1`. * `--X` and `X--` **decrements** the value of the variable `X` by `1`. Initially, the value of `X` is `0`. Given an array of strings `operations` containing a list of operations, return _the **final** value of_ `X` _after performing all the operations_. **Example 1:** **Input:** operations = ["--X","X++","X++"] **Output:** 1 **Explanation:** The operations are performed as follows: Initially, X = 0. --X: X is decremented by 1, X = 0 - 1 = -1. X++: X is incremented by 1, X = -1 + 1 = 0. X++: X is incremented by 1, X = 0 + 1 = 1. **Example 2:** **Input:** operations = ["++X","++X","X++"] **Output:** 3 **Explanation:** The operations are performed as follows: Initially, X = 0. ++X: X is incremented by 1, X = 0 + 1 = 1. ++X: X is incremented by 1, X = 1 + 1 = 2. X++: X is incremented by 1, X = 2 + 1 = 3. **Example 3:** **Input:** operations = ["X++","++X","--X","X--"] **Output:** 0 **Explanation:** The operations are performed as follows: Initially, X = 0. X++: X is incremented by 1, X = 0 + 1 = 1. ++X: X is incremented by 1, X = 1 + 1 = 2. --X: X is decremented by 1, X = 2 - 1 = 1. X--: X is decremented by 1, X = 1 - 1 = 0. **Constraints:** * `1 <= operations.length <= 100` * `operations[i]` will be either `"++X"`, `"X++"`, `"--X"`, or `"X--"`.

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • finalValueAfterOperations

      public int finalValueAfterOperations(String[] operations)